rp,
I tried several different things with help from those here to get consistent accuracy and consistent P.O.I. from my 22 Hornet.
In the end, I shimmed and epoxy bedded the shoe to the forearm for better lock up, then dowel sanded out the forearm from the stud area forward and added the O ring.
These two steps improved both. It is difficult to determine the correct lock up. I did so by trial and error shooting on my home range. I noted this changed accuracy the most. Because I don't have exact measurements to the thousanths of an inch for you. I can simply say, my lock up is such that when I break the rifle open in the horizontal position it drops to wear the ejecter engages but does not allow it to engage, with out me applying downward pressure. Previously, it would engage and just flop open all the way. This adjustment helped the accuracy and was quite simple once I put my mind to doing it. The float / O ring helped with consistant P.O.I. cold,warm,hot and from shooting sticks. My Hornet is really quite accurate now.
If you choose there is also a shop that specializes in accurizing Handi Rifles. They are a sponcer at rimfirecentral.com .............I forget their name but, noted they are quite reasonable. He would glass bed & float the barrel, touch up the crown and adjust the trigger for what seemed to me a fair price. Also does Green Mountain stub barrel conversions. Just remembered the name...........I believe it's (censored word).
I hope this helps. Don't give up, it's quite simple and you may appreciate it more as I have once complete.